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A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit.
The Solar System has eight planets by the most restrictive definition of the term: the terrestrial planets Mercury, Venus, Earth, and Mars, and the giant planets Jupiter, Saturn, Uranus, and Neptune.
A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.
27 Ιουν 2019 · What Is a Planet? | NASA Space Place – NASA Science for Kids. The Short Answer: A planet must do three things: it must orbit a star, it must be big enough to have enough gravity to force a spherical shape, and it must be big enough that its gravity cleared away any objects of a similar size near its orbit.
10 Οκτ 2024 · Planet, broadly, any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions. There are eight planets orbiting the Sun in the solar system.
A planet is a celestial body that is in orbit around a star; it has enough mass for its gravity to create a round shape; and it has cleared its neighborhood of smaller objects. Once planets form in disks, they are not going to stay in place.
29 Ιουν 2015 · NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. Classic video explaining the history, debate and continuing discussion of the definition of a planet.
